Biology 10/21/13 Mrs. TurgeonBiology 10/21/13 Mrs. Turgeon

““A positive attitude causes a chain reaction of positive thoughts, events A positive attitude causes a chain reaction of positive thoughts, events and outcomes. It is a catalyst and it sparks extraordinary results.”and outcomes. It is a catalyst and it sparks extraordinary results.”

– –Wade BoggsWade Boggs

DO NOW:DO NOW:

1.1.Pass forward your homework (population graph)Pass forward your homework (population graph)

2.2.In your notes: What is carrying capacity?In your notes: What is carrying capacity?

AGENDA:AGENDA:

1. Understand the basic structures of a cell by taking notes and using 1. Understand the basic structures of a cell by taking notes and using the textbookthe textbook

REMINDERS:REMINDERS:

1.1.Science club tomorrow! After school, room 312Science club tomorrow! After school, room 312

2.2.Extra credit opportunity! Find a science fair judge (Nov. 8)Extra credit opportunity! Find a science fair judge (Nov. 8)

A View of the CellA View of the Cell

1.1.You need one textbook for every two students. You need one textbook for every two students.

2.2.You will be taking notes from the screen and using your You will be taking notes from the screen and using your textbooktextbook

Background InfoBackground InfoCellsCells = smallest unit = smallest unit that can carry on all that can carry on all life processeslife processes1665 Robert Hooke 1665 Robert Hooke first observed ‘cells’ first observed ‘cells’ using light using light microscopemicroscope1673 Anton van 1673 Anton van Leeuwenhoek first Leeuwenhoek first observed living cells observed living cells with a better crafted with a better crafted lenslens

Light microscopes(p. 171)Light microscopes(p. 171)

Use your textbook to answer the following Use your textbook to answer the following questions. Write the answers in your notes. questions. Write the answers in your notes. Be ready to share your answers.Be ready to share your answers.

1.1.What is the name of the microscope we What is the name of the microscope we use in biology class?use in biology class?

2.2.Briefly describe how it functions.Briefly describe how it functions.

Light Microscopes (p. 171)Light Microscopes (p. 171)

Compound Light Compound Light MicroscopeMicroscope = uses = uses lenseslenses to magnify to magnify objects, can magnify objects, can magnify up to 1500 timesup to 1500 times

Electron Microscopes(p. 172)Electron Microscopes(p. 172)

Use your textbook to answer the following Use your textbook to answer the following question. Write the answer in your notes. question. Write the answer in your notes. Be ready to share your answer.Be ready to share your answer.

1. How does an electron microscope 1. How does an electron microscope magnify objects?magnify objects?

Electron Microscopes (p. 172)Electron Microscopes (p. 172)Electron MicroscopeElectron Microscope = uses a = uses a beam of beam of electronselectrons instead of instead of light to magnify light to magnify structures, can structures, can magnify up to magnify up to 500,000 times500,000 times

SEMSEM = scanning = scanning electron microscope, electron microscope, scans the surface of scans the surface of cellcell

TEMTEM = transmission = transmission electron microscope, electron microscope, allows view within cellallows view within cell

Cell Theory(p. 172)Cell Theory(p. 172)

Use your textbook to answer the following Use your textbook to answer the following question. Write the answer in your notes. question. Write the answer in your notes. Be ready to share your answer.Be ready to share your answer.

1. What is the first main idea in the cell 1. What is the first main idea in the cell theory?theory?

Cell TheoryCell Theory (p.172) (p.172)

1. All living organisms are comprised of one 1. All living organisms are comprised of one or more cells.or more cells.

2. Cells are the basic units of structure, 2. Cells are the basic units of structure, function, and organization in an function, and organization in an organism.organism.

3. Cells come only from preexisting 3. Cells come only from preexisting cells.cells.

Types of Cells (p.173)Types of Cells (p.173)

Use your textbook to answer the following Use your textbook to answer the following questions. Write the answers in your notes. questions. Write the answers in your notes. Be ready to share your answers.Be ready to share your answers.

1.1.How many cell types are there?How many cell types are there?

2.2.What are their names?What are their names?

Types of Cells (p.173)Types of Cells (p.173)

1. Prokaryotes1. Prokaryotes = bacteria cells= bacteria cells

No true nucleus, not membrane boundNo true nucleus, not membrane bound

NucleoidNucleoid = unbound ball of DNA= unbound ball of DNA

2 Domains2 Domains– ArchaeaArchaea = similar to 1 = similar to 1stst forms of life on earth forms of life on earth– EubacteriaEubacteria = more closely related to = more closely related to

eukaryotic cellseukaryotic cells

2. Eukaryotes2. Eukaryotes = plant & animal cells with = plant & animal cells with a a true membrane bound nucleustrue membrane bound nucleus

Organisms made up of one or more cellsOrganisms made up of one or more cells

Membrane bound organellesMembrane bound organelles

OrganellesOrganelles = well-defined structures, = well-defined structures, perform specific functions, usually perform specific functions, usually surrounded by membranesurrounded by membrane

Larger than prokaryotic cellsLarger than prokaryotic cells

Basic Parts of A CellBasic Parts of A Cell

Plasma MembranePlasma Membrane = cell membrane, = cell membrane, barrier between outside & insidebarrier between outside & inside

CytoplasmCytoplasm = = – fluid (fluid (cytosolcytosol))– organelles inside the cellorganelles inside the cell

NucleusNucleus = membrane bound organelle containing = membrane bound organelle containing DNADNA

PracticePractice

Compare and contrast Eukaryotic Cells Compare and contrast Eukaryotic Cells and Prokaryotic Cells.and Prokaryotic Cells.

In your notes, write at least one similarity In your notes, write at least one similarity and one differenceand one difference

Be prepared to share with the class! Be prepared to share with the class!